An EPR study on tea: Identification of paramagnetic species, effect of heat and sweeteners

Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy

Volumn 74, Issue 3, 2009, Pages 767-770

  Biyik, Recep ^a   Tapramaz, Recep ^a  

^a ONDOKUZ MAYIS UNIVERSITY   (Turkey)

Author keywords

Antioxidant; Catechin; EPR; Metal complex; Semiquinone; Sweetener; Tea

Indexed keywords

ANTIOXIDANT; CATECHIN; EPR; SEMIQUINONE; SWEETENER; TEA;

BEVERAGES; ELECTRON RESONANCE; ESTERS; FOOD ADDITIVES; GLUCOSE; MANGANESE; MANGANESE COMPOUNDS; METAL COMPLEXES; PARAMAGNETIC MATERIALS; PARAMAGNETIC RESONANCE; PARAMAGNETISM; PHENOLS; POTASSIUM; QUANTUM THEORY; SODIUM; SPECTROSCOPIC ANALYSIS; SUGAR (SUCROSE);

ELECTRON SPIN RESONANCE SPECTROSCOPY;

FERRIC ION; MAGNESIUM DERIVATIVE; SWEETENING AGENT;

ARTICLE; CHEMISTRY; ELECTRON SPIN RESONANCE; HEAT; TEA;

CAMELLIA SINENSIS; ELECTRON SPIN RESONANCE SPECTROSCOPY; FERRIC COMPOUNDS; HOT TEMPERATURE; MAGNESIUM COMPOUNDS; SWEETENING AGENTS; TEA;

EID: 70249108474     PISSN: 13861425     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.saa.2009.08.014     Document Type: Article

References (34)

1. Wheeler D.S., and Wheeler W.J. Drug Dev. Res. 61 (2004) 45
2. Chen L., Yang X., Jiao H., and Zhao B. Toxicol. Sci. 69 (2002) 149
3. Kumamato M., Sonda T., Nagayama K., and Tabata M. Biosci. Biotechnol. Biochem. 65 1 (2001) 126
4. Hayakawa F., Ishizu Y., Hi{dotless}shino N., and Yamaji A. Biosci. Biotechnol. Biochem. 68 9 (2004) 1825
5. Jo C., Son J.H., Lee H.J., and Byun M.W. Radiat. Phys. Chem. 66 (2003) 179
6. An B.J., Kwak J.H., Son J.H., Park J.M., Lee J.Y., Jo C., and Byun M.W. Food Chem. 88 (2004) 549
7. Unno T., Yayabe F., Hayakawa T., and Tsuge H. Food Chem. 76 (2002) 259
8. De-Song T., Shen-rong S., Xun C., Yu-yan Z., Chong-yang X., and Zhejiang J. Univ. Sci. 586 (2004) 668
9. Wu C.H., and Yen G.C. Life Sci. 76 (2004) 85
10. A.H. Lee, M.L. Fraser, C.V. Bins, Mol. Nutr. Food Res. doi:10.1002/mnfr.200800218.
11. Graham H.N. Prev. Med. 21 (1992) 334
12. Tüfekci M., and Güner S. Food Chem. 60 (1996) 53
13. Rijken P.J., Wiseman S.A., Weisgerber U.M., Van Mierio C.A.J., Quinian P.T., Van De Put F., Balentine D.A., and Robinson P. Antioxidant and Other Properties of Green and Black Tea Handbook of Antioxidants (2001), Basel, New York
14. Luczaj W., and Skrzydlewska E. Prev. Med. 40 (2005) 910
15. Ferrara L., Montesano D., and Senatore A. Il Farmaco 56 (2001) 397
16. Kumar N.S., and Rajapaksha M. J. Chromatogr. A 1083 (2005) 223
17. Lucy Yu L., and Cheng Z. Mol. Nutr. Food Res. 52 (2008) 62
18. Morsy M.A., and Khaled M.M. Spectrochim. Acta Part A 58 (2002) 1271
19. Polovka M., Brezová V., and Staško A. Biophys. Chem. 106 (2003) 39
20. Bors W., Michel C., and Stettmaier K. Arch. Biochem. Biophys. 374 2 (2000) 347
21. Narin I., Çolak H., Turkoglu O., Soylak M., and Doǧan M. Bull. Environ. Contam. Toxicol. 72 (2004) 844
22. Ashraf W., and Mian A.A. Bull. Environ. Contam. Toxicol. 81 (2008) 101
23. Olivié-Lauquet G., Allard T., Benedetti M., and Muller J.P. Water Resour. 33 11 (1999) 2726
24. Olivié-Lauquet G., Allard T., Bertaux J., and Muller J.P. Chem. Geol. 170 (2000) 113
25. Allard T., Menguy N., Salomon J., Calligaro T., Weber T., Calas G., and Benedetti M.F. Geochim. Cosmochim. Acta 63 14 (2004) 3079
26. Jerzykiewicz M., Drozd J., and Jezierski A. Chemosphere 39 2 (1999) 253
27. Weil J.A., Bolton J.R., and Wertz J.E. Electron Paramagnetic Resonance (1994), John Wiley and Sons, New York
28. Ikeya M. New Applications of Electron Spin Resonance, Dating Dosimetry and Microscopy (1993), Scientific Publishing Company, Singapure
29. Weber T., Allard T., and Benedetti M.F. J. Geochem. Explor. 88 (2006) 166
30. Felix C.C., and Prabhananda B.S. J. Chem. Phys. 80 7 (1984) 3078
31. Chowdhury A.B., and Samita B. J. Photochem. Photobiol. A 201 (2009) 197
32. Rashidian M., and Fattahi A. Carbohydr. Res. 344 (2009) 127
33. Gryszczynka B., Iskra M., Malecka M., and Wielkoszynski T. Food Chem. 112 (2008) 695
34. Yang C.S., Prabhu S., and Landau J. Drug Metab. Rev. 33 (2001) 237